Heater.



Patented December 15, 1903.

PATENT OFFICE.

SPENCER T. AXTELL, OF OSWEGO, NEW YORK.

HEATER.

SPECIFICATION forming` part of Letters Patent No. 747,312, dated December 15, 1903.

Application led March 7 1902.

To @ZZ whom it may concern.' I

Be it known that I, SPENCER T. AxrELL, of Oswego, in the county of Oswego, in the State of New York, have invented new and useful Improvements in Heaters, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to improvements in heaters, having more particular reference to gas and vapor burners adapted to be used in connection with steam-boilers in which gas is used as a fuel, and is particularly applicable for steam-carriages.

The object of my invention is toobviate the heating of the walls of the gas-receiving shell.

Another object is to provide the shell with a series of independent burners each of which may be adjusted independently of the other to regulate the quantity of fuel discharged therefrom. v

A further object is to so construct and connect the burners that the parts thereof may be readily and easily removed when desired.

A still further object is to obviate the necessity of swaging or expanding the air-circulating tubes to the opposite heads of the shell,

thereby permitting a free expansion of the heads and parts of the burner independently of each other.

To this end the invention consists in the construction and arrangement of the parts of a heater as hereinaft'erfully described, and pointed out in the claims.

Referring to the drawings, Figure lis a top plan, partly broken away, of a heater ernbodying the various features of my invention. Fig. 2 is a transverse` vertical section taken on line 2 2, Fig. 1. Fig. 3 is an enlarged vertical section through one of the burners and adjacent walls of the shell, showing particularly the different positions to which either the fuel-tube or the air-t ube may be adj usted relatively to eachother f or varying the quantity of fuel discharged therethrough. Figs. 4. and 5 are perspective views, respectively, of

Serial No. 97,087. (No model.)

one of the detached air-tubes and one of the fuel-tubes.

Similar reference characters indicate corresponding parts in all the views.

My invention is designed to permit a free expansion of the various parts both of lthe shell and burners, and I also arrange the burners so that the flames are removed a considerable distance fromthe shell, parts of the burnersbeing adjustable, so that only lthe proper quantity of gas is discharged or consumed.

As seen in ,the drawings, my improved heater consists, essentially, of a shell l, an inlet-conduit 2, and a series of burners 3.

The shell l may be of any desired form, size, or construction, either of sheet metal or cast-iron, being preferably formed of sheetmetal plates 4- and 5, which are circular in cross-section and form the opposite end heads of a gas-receiving chamber 6, the head or plate 4 being usually stamped from a single piece of sheet metal and is substantially iat, while the head or plate 5 isA also stamped from a single piece of sheet metal in the form of an inverted cup havingthe annular basetlange 7 resting upon the plate 4 and secured thereto by any desired fastening means, as bolts or rivets 8.

The head 4 is provided with a series of 'threaded apertures 9, and the head 5 is also provided with a series of threaded apertures 10 of larger diameter than the apertures '9 and alined therewith, so as to form substantially series of continuous openings through the shell.

The peripheral wall of the chamber 6,4

found aords a better means for equal distribution of the gas throughout the area of the chamber 6, said conduit being usuallyA provided with a valve 13 for controlling the supply of gas to the chamber 6.

The burners 3 are suitably positioned on the shell to distribute the heat uniformly be neath the boiler to which the heater is applied and preferably projects a suicient distance beyond one of the walls or heads of the shell, as a head 5, so that there is no liability of the heat from the several burners having anyinjurious effect upon the shell. Each of these burners preferably consists of a fuel tube or nipple 14 and an air-tube l5, the tubes 14 having their inner ends threaded and adjustably secured in the threaded apertures 10, and their outer ends project a considerable distance beyond the outer face of the plate 5, said tubes 14 being open at both ends for forming a fuel-outlet passage 16, the inner end of which communicates with the chamber 6, and the outer end opens to the atmosphere. threaded at one end and are adjustably secured in threaded apertures 9 of the opposite head 4, and the other ends extend upwardly through and above the tubes 14 and are provided with annular flanges 17, which overhang the outer ends of the passages 16 in such manner as to form an abutment for the fuel discharged through the passages 16. The portions of the tubes 15 passing through the tubes 14 are of less diameter than the inner diameter of the tubes 14 in order that ample space may be left for the passage of the fuel through the passages 16 and around the tubes 15.

It is apparent from the foregoing description and the accompanying drawings that the tubes 14 and 15 are secured to opposite heads of the shell 1 and are adjustable lengthwise of each other, the annular flanges 17 being formed of greater diameter than the inner diameter of the tubes 14 or passages 16. It

is evident that as one or the other of the tubes` is adjusted toward and away from the other the space between the flange 17 and adjacent end of the tube 14 is varied and that the quantity of gas or other fuel discharged through the passage 16 may be varied at will. It is also apparent that each head, with its respective tubes secured thereto, is free to expand or contract Without injuriously aifecting any of the parts, the tubes themselves being also free to expand lengthwise of each other. If it is desired to adjust the nipples 14 independently of the tubes 15, a suitable pipewrench or other device may be gripped upon the exterior of the tubes 14, which are then rotated in the proper direction to raise or lower the same, as may be necessary, or, on the other hand, if it is desired to adjust the tubes 15 independently of the tube 14 a suitable instrument, as a screw-driver, may be The airtubes 15 are inserted in the slots 20, provided on the npper surfaces of the danges 17, and the tube rotated in the direction to give the required adjustment.

In the operation of my invention the fuel is admitted through the inlet-conduit 2 into the chamber 6, from which it passes through the passages 16 and may be ignited at the outer ends of said passages. If it is found that ,the quantity of gas escaping through the passage is more or less than is required, either of the tubes of the burner 3 may be adjusted lengthwise of the other to vary the space between the flanges 17 and the adjacent ends of the tubes 14, this space determining the quantity of fuel owing from the burners.

The operation of my invention will now be readily understood upon reference to the foregoing description and the accompanying drawings, and it will be noted that although I have shown both tubes as being adjusted it is evident that one may be iixed and the other adjusted with equal efficiency and that other changes may be made in the detail construction of the burner without departing from the spirit of this invention. Therefore I do not limit myself to the precise form shown and described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A heater comprising a gas-receiving chamber-having opposite end heads provided with apertures alined with each other, the apertures in one head being of greater diameter than those in the opposite head, gastubes inserted in the larger apertures and projecting outwardly therefrom, air-tubes inserted in the smaller apertures and projecting through the gas-chamber and former tubes and provided with annular iianges overhanging, but separated from the outer ends of said former tubes for spreading and regulating the size of the flame.

2. A heater comprising a gas-receiving chamber having lower and upper heads, tubes projecting upwardly from the upper head and communicating with the chamber, additional tubes adjustably secured to the lower head and projecting through the chamber and former tubes, the lower ends of the additional tubes communicating with atmosphere and their upper ends having annular liange's overhanging the upper ends of said former tubes and separate therefrom.

3. A heater comprising a gas-receiving chamber having lower and upper heads provided with alined apertures, gas-tubes adjustably secured in the apertures of the up per head and projecting upwardly therefrom, air-tubes secured in the apertures of the lower head and projecting through the chamber and gas-tubes, the lower ends of the air-tubes communicating with the atmosphere and their upper ends having annular flanges over- IOO IIO

hanging the outer ends of the gas-tubes and Vseparate therefrom.

4. A heater comprising a gas-chamber having upper and lower heads provided with alined apertures, the apertures in the upper head being of greater diameter than those in the lower head, gas-tubes adjustably secured in the apertures of the upper head and projecting outwardly therefrom, air-tubes adxo j ustably secured in the apertures of the lower head and projecting through the gas-chamber l and outwardly through the gas-tubes, the outer ends of the air-tubes having annular anges over-hangin g the outer ends of the gastubes and separated therefrom for the purpose described.

In witness whereof I have hereunto set my hand this 27th day of February, 1902.

SPENCER T. AXTELL. Witnesses:

F. J. MCNAMARA, E. I-I. FOLEY. 

